1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef BOOT_COMPRESSED_MISC_H
3 #define BOOT_COMPRESSED_MISC_H
4
5 /*
6 * Special hack: we have to be careful, because no indirections are allowed here,
7 * and paravirt_ops is a kind of one. As it will only run in baremetal anyway,
8 * we just keep it from happening. (This list needs to be extended when new
9 * paravirt and debugging variants are added.)
10 */
11 #undef CONFIG_PARAVIRT
12 #undef CONFIG_PARAVIRT_XXL
13 #undef CONFIG_PARAVIRT_SPINLOCKS
14 #undef CONFIG_KASAN
15 #undef CONFIG_KASAN_GENERIC
16
17 #define __NO_FORTIFY
18
19 /* cpu_feature_enabled() cannot be used this early */
20 #define USE_EARLY_PGTABLE_L5
21
22 /*
23 * Boot stub deals with identity mappings, physical and virtual addresses are
24 * the same, so override these defines.
25 *
26 * <asm/page.h> will not define them if they are already defined.
27 */
28 #define __pa(x) ((unsigned long)(x))
29 #define __va(x) ((void *)((unsigned long)(x)))
30
31 #include <linux/linkage.h>
32 #include <linux/screen_info.h>
33 #include <linux/elf.h>
34 #include <asm/page.h>
35 #include <asm/boot.h>
36 #include <asm/bootparam.h>
37 #include <asm/desc_defs.h>
38
39 #include "tdx.h"
40
41 #define BOOT_CTYPE_H
42 #include <linux/acpi.h>
43
44 #define BOOT_BOOT_H
45 #include "../ctype.h"
46 #include "../io.h"
47
48 #include "efi.h"
49
50 #ifdef CONFIG_X86_64
51 #define memptr long
52 #else
53 #define memptr unsigned
54 #endif
55
56 /* boot/compressed/vmlinux start and end markers */
57 extern char _head[], _end[];
58
59 /* misc.c */
60 extern memptr free_mem_ptr;
61 extern memptr free_mem_end_ptr;
62 void *malloc(int size);
63 void free(void *where);
64 void __putstr(const char *s);
65 void __puthex(unsigned long value);
66 #define error_putstr(__x) __putstr(__x)
67 #define error_puthex(__x) __puthex(__x)
68
69 #ifdef CONFIG_X86_VERBOSE_BOOTUP
70
71 #define debug_putstr(__x) __putstr(__x)
72 #define debug_puthex(__x) __puthex(__x)
73 #define debug_putaddr(__x) { \
74 debug_putstr(#__x ": 0x"); \
75 debug_puthex((unsigned long)(__x)); \
76 debug_putstr("\n"); \
77 }
78
79 #else
80
debug_putstr(const char * s)81 static inline void debug_putstr(const char *s)
82 { }
debug_puthex(unsigned long value)83 static inline void debug_puthex(unsigned long value)
84 { }
85 #define debug_putaddr(x) /* */
86
87 #endif
88
89 /* cmdline.c */
90 int cmdline_find_option(const char *option, char *buffer, int bufsize);
91 int cmdline_find_option_bool(const char *option);
92
93 struct mem_vector {
94 u64 start;
95 u64 size;
96 };
97
98 #ifdef CONFIG_RANDOMIZE_BASE
99 /* kaslr.c */
100 void choose_random_location(unsigned long input,
101 unsigned long input_size,
102 unsigned long *output,
103 unsigned long output_size,
104 unsigned long *virt_addr);
105 #else
choose_random_location(unsigned long input,unsigned long input_size,unsigned long * output,unsigned long output_size,unsigned long * virt_addr)106 static inline void choose_random_location(unsigned long input,
107 unsigned long input_size,
108 unsigned long *output,
109 unsigned long output_size,
110 unsigned long *virt_addr)
111 {
112 }
113 #endif
114
115 /* cpuflags.c */
116 bool has_cpuflag(int flag);
117
118 #ifdef CONFIG_X86_64
119 extern int set_page_decrypted(unsigned long address);
120 extern int set_page_encrypted(unsigned long address);
121 extern int set_page_non_present(unsigned long address);
122 extern unsigned char _pgtable[];
123 #endif
124
125 #ifdef CONFIG_EARLY_PRINTK
126 /* early_serial_console.c */
127 extern int early_serial_base;
128 void console_init(void);
129 #else
130 static const int early_serial_base;
console_init(void)131 static inline void console_init(void)
132 { }
133 #endif
134
135 #ifdef CONFIG_AMD_MEM_ENCRYPT
136 void sev_enable(struct boot_params *bp);
137 void snp_check_features(void);
138 void sev_es_shutdown_ghcb(void);
139 extern bool sev_es_check_ghcb_fault(unsigned long address);
140 void snp_set_page_private(unsigned long paddr);
141 void snp_set_page_shared(unsigned long paddr);
142 void sev_prep_identity_maps(unsigned long top_level_pgt);
143 #else
sev_enable(struct boot_params * bp)144 static inline void sev_enable(struct boot_params *bp)
145 {
146 /*
147 * bp->cc_blob_address should only be set by boot/compressed kernel.
148 * Initialize it to 0 unconditionally (thus here in this stub too) to
149 * ensure that uninitialized values from buggy bootloaders aren't
150 * propagated.
151 */
152 if (bp)
153 bp->cc_blob_address = 0;
154 }
snp_check_features(void)155 static inline void snp_check_features(void) { }
sev_es_shutdown_ghcb(void)156 static inline void sev_es_shutdown_ghcb(void) { }
sev_es_check_ghcb_fault(unsigned long address)157 static inline bool sev_es_check_ghcb_fault(unsigned long address)
158 {
159 return false;
160 }
snp_set_page_private(unsigned long paddr)161 static inline void snp_set_page_private(unsigned long paddr) { }
snp_set_page_shared(unsigned long paddr)162 static inline void snp_set_page_shared(unsigned long paddr) { }
sev_prep_identity_maps(unsigned long top_level_pgt)163 static inline void sev_prep_identity_maps(unsigned long top_level_pgt) { }
164 #endif
165
166 /* acpi.c */
167 #ifdef CONFIG_ACPI
168 acpi_physical_address get_rsdp_addr(void);
169 #else
get_rsdp_addr(void)170 static inline acpi_physical_address get_rsdp_addr(void) { return 0; }
171 #endif
172
173 #if defined(CONFIG_RANDOMIZE_BASE) && defined(CONFIG_MEMORY_HOTREMOVE) && defined(CONFIG_ACPI)
174 extern struct mem_vector immovable_mem[MAX_NUMNODES*2];
175 int count_immovable_mem_regions(void);
176 #else
count_immovable_mem_regions(void)177 static inline int count_immovable_mem_regions(void) { return 0; }
178 #endif
179
180 /* ident_map_64.c */
181 extern unsigned int __pgtable_l5_enabled, pgdir_shift, ptrs_per_p4d;
182 extern void kernel_add_identity_map(unsigned long start, unsigned long end);
183
184 /* Used by PAGE_KERN* macros: */
185 extern pteval_t __default_kernel_pte_mask;
186
187 /* idt_64.c */
188 extern gate_desc boot_idt[BOOT_IDT_ENTRIES];
189 extern struct desc_ptr boot_idt_desc;
190
191 #ifdef CONFIG_X86_64
192 void cleanup_exception_handling(void);
193 #else
cleanup_exception_handling(void)194 static inline void cleanup_exception_handling(void) { }
195 #endif
196
197 /* IDT Entry Points */
198 void boot_page_fault(void);
199 void boot_nmi_trap(void);
200 void boot_stage1_vc(void);
201 void boot_stage2_vc(void);
202
203 unsigned long sev_verify_cbit(unsigned long cr3);
204
205 enum efi_type {
206 EFI_TYPE_64,
207 EFI_TYPE_32,
208 EFI_TYPE_NONE,
209 };
210
211 #ifdef CONFIG_EFI
212 /* helpers for early EFI config table access */
213 enum efi_type efi_get_type(struct boot_params *bp);
214 unsigned long efi_get_system_table(struct boot_params *bp);
215 int efi_get_conf_table(struct boot_params *bp, unsigned long *cfg_tbl_pa,
216 unsigned int *cfg_tbl_len);
217 unsigned long efi_find_vendor_table(struct boot_params *bp,
218 unsigned long cfg_tbl_pa,
219 unsigned int cfg_tbl_len,
220 efi_guid_t guid);
221 #else
efi_get_type(struct boot_params * bp)222 static inline enum efi_type efi_get_type(struct boot_params *bp)
223 {
224 return EFI_TYPE_NONE;
225 }
226
efi_get_system_table(struct boot_params * bp)227 static inline unsigned long efi_get_system_table(struct boot_params *bp)
228 {
229 return 0;
230 }
231
efi_get_conf_table(struct boot_params * bp,unsigned long * cfg_tbl_pa,unsigned int * cfg_tbl_len)232 static inline int efi_get_conf_table(struct boot_params *bp,
233 unsigned long *cfg_tbl_pa,
234 unsigned int *cfg_tbl_len)
235 {
236 return -ENOENT;
237 }
238
efi_find_vendor_table(struct boot_params * bp,unsigned long cfg_tbl_pa,unsigned int cfg_tbl_len,efi_guid_t guid)239 static inline unsigned long efi_find_vendor_table(struct boot_params *bp,
240 unsigned long cfg_tbl_pa,
241 unsigned int cfg_tbl_len,
242 efi_guid_t guid)
243 {
244 return 0;
245 }
246 #endif /* CONFIG_EFI */
247
248 #ifdef CONFIG_UNACCEPTED_MEMORY
249 bool init_unaccepted_memory(void);
250 #else
init_unaccepted_memory(void)251 static inline bool init_unaccepted_memory(void) { return false; }
252 #endif
253
254 /* Defined in EFI stub */
255 extern struct efi_unaccepted_memory *unaccepted_table;
256 void accept_memory(phys_addr_t start, phys_addr_t end);
257
258 #endif /* BOOT_COMPRESSED_MISC_H */
259